Extern or forward variable declaration at include/linux/perf_event.h, line 530 References: include/linux/perf_event.h, line 530 include/linux/perf_event.h, line 701 include/linux/perf_event.h, line 783 include/linux/perf_event.h, line 822 include/linux/perf_event.h, line 832 include/linux/perf_event.h, line 838 kernel/events/core.c, line 630 kernel/events/core.c, line 645 kernel/events/core.c, line 652 kernel/events/core.c, line 673 kernel/events/core.c, line 751 kernel/events/core.c, line 752 kernel/events/core.c, line 777 kernel/events/core.c, line 778 kernel/events/core.c, line 804 kernel/events/core.c, line 819 kernel/events/core.c, line 904 kernel/events/core.c, line 11256 kernel/events/core.c, line 11273 kernel/events/core.c, line 11273